Diagnosis
The basis communication structure &v1& could not be written to the DDIC.
A basis communication structure is a standard structure. It must fulfillcertain minimum requirements in terms of consistency before it can becreated in the DDIC. The problem is probably due to an error in thefield catalog definition or a programming error.
For each registered application, one basis communication structure isgenerated for the search criteria that are constant, frequentlyconstant, and variable across several search queries. They contain allthe fields that are required to search for condition records in thisapplication and the subordinate applications in the relevant category.Examples of fields from the three categories based on a sales order inCRM:
Constant field: the sales order number
Frequently constant field: sales organization, sold-to party (unlike inR/3, these are item fields in CRM)
Variable field: product (probably a different entry in each item)

System Response
The basis communication structure &v1& is not copied to the DDIC andcannot be activated later because it does not exist in the DDIC.

Procedure
Inform your system administrator.

Procedure for System Administration
If the error occurred after you added a new field to the field catalog,check the consistency of the field catalog. Otherwise, contact yoursupport organization.